Forms.TextCell StyleId not being rendered on iOS - other StyleIds are

I am setting the StyleId on a TextCell and when I inspect it in a Repl window it does not get set. I can see other Ids being set for other controls.

var introWalkthroughCell = new TextCell { Text = "Welcome Walkthrough", StyleId = "btnWelcomeWalkthrough" };

[25] {
Id => null,
Description => ">",
Rect => {
Width => 320,
Height => 44,
X => 0,
Y => 99,
CenterX => 160,
CenterY => 121
},
Label => null,
Text => "Welcome Walkthrough",
Class => "Xamarin_Forms_Platform_iOS_CellTableViewCell",
Enabled => true
},